1. twelve o’clock at night; the middle of the night

1. happening at or near midnight
2. very dark blue or black in color

Examples

• The clock struck midnight as the new year began.
• She worked until midnight to finish her project.
• The midnight train departed right on schedule.
• We took a midnight walk through the quiet streets.
• The sky was a beautiful midnight blue.
• His midnight hair gleamed in the moonlight.
• The midnight oil burned as students studied for exams.